src/mode.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "users.h"
  16 #include "modules.h"
  17 #include "inspstring.h"
  18 #include "mode.h"
  19
  20 /* +s (secret) */
  21 #include "modes/cmode_s.h"
  22 /* +p (private) */
  23 #include "modes/cmode_p.h"
  24 /* +b (bans) */
  25 #include "modes/cmode_b.h"
  26 /* +m (moderated) */
  27 #include "modes/cmode_m.h"
  28 /* +t (only (half) ops can change topic) */
  29 #include "modes/cmode_t.h"
  30 /* +n (no external messages) */
  31 #include "modes/cmode_n.h"
  32 /* +i (invite only) */
  33 #include "modes/cmode_i.h"
  34 /* +k (keyed channel) */
  35 #include "modes/cmode_k.h"
  36 /* +l (channel user limit) */
  37 #include "modes/cmode_l.h"
  38 /* +o (channel op) */
  39 #include "modes/cmode_o.h"
  40 /* +h (channel halfop) */
  41 #include "modes/cmode_h.h"
  42 /* +v (channel voice) */
  43 #include "modes/cmode_v.h"
  44 /* +s (server notices) */
  45 #include "modes/umode_s.h"
  46 /* +w (see wallops) */
  47 #include "modes/umode_w.h"
  48 /* +i (invisible) */
  49 #include "modes/umode_i.h"
  50 /* +o (operator) */
  51 #include "modes/umode_o.h"
  52 /* +n (notice mask - our implementation of snomasks) */
  53 #include "modes/umode_n.h"
  54
  55 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
  56         : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0)
  57 {
  58 }
  59
  60 ModeHandler::~ModeHandler()
  61 {
  62 }
  63
  64 bool ModeHandler::IsListMode()
  65 {
  66         return list;
  67 }
  68
  69 unsigned int ModeHandler::GetPrefixRank()
  70 {
  71         return 0;
  72 }
  73
  74 unsigned int ModeHandler::GetCount()
  75 {
  76         return 0;
  77 }
  78
  79 void ModeHandler::ChangeCount(int modifier)
  80 {
  81         count += modifier;
  82 }
  83
  84 ModeType ModeHandler::GetModeType()
  85 {
  86         return m_type;
  87 }
  88
  89 bool ModeHandler::NeedsOper()
  90 {
  91         return oper;
  92 }
  93
  94 char ModeHandler::GetPrefix()
  95 {
  96         return prefix;
  97 }
  98
  99 int ModeHandler::GetNumParams(bool adding)
 100 {
 101         return adding ? n_params_on : n_params_off;
 102 }
 103
 104 char ModeHandler::GetModeChar()
 105 {
 106         return mode;
 107 }
 108
 109 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding)
 110 {
 111         return MODEACTION_DENY;
 112 }
 113
 114 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter)
 115 {
 116         if (dest)
 117         {
 118                 return std::make_pair(dest->IsModeSet(this->mode), "");
 119         }
 120         else
 121         {
 122                 return std::make_pair(channel->IsModeSet(this->mode), "");
 123         }
 124 }
 125
 126 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
 127 {
 128 }
 129
 130 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
 131 {
 132         return (ours < theirs);
 133 }
 134
 135 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
 136 {
 137 }
 138
 139 ModeWatcher::~ModeWatcher()
 140 {
 141 }
 142
 143 char ModeWatcher::GetModeChar()
 144 {
 145         return mode;
 146 }
 147
 148 ModeType ModeWatcher::GetModeType()
 149 {
 150         return m_type;
 151 }
 152
 153 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string &parameter, bool adding, ModeType type)
 154 {
 155         return true;
 156 }
 157
 158 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string &parameter, bool adding, ModeType type)
 159 {
 160 }
 161
 162 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
 163 {
 164         userrec *d;
 165         if ((!user) || (!dest) || (!chan) || (!*dest))
 166         {
 167                 return NULL;
 168         }
 169         d = ServerInstance->FindNick(dest);
 170         if (!d)
 171         {
 172                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
 173                 return NULL;
 174         }
 175         return d;
 176 }
 177
 178 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
 179 {
 180         if (!chan)
 181                 return "";
 182
 183         UCListIter n = d->chans.find(chan);
 184         if (n != d->chans.end())
 185         {
 186                 if (n->second & MASK)
 187                 {
 188                         ServerInstance->Log(DEBUG,"User already has privilage %d (privset: %d)", MASK, n->second);
 189                         return "";
 190                 }
 191                 n->second = n->second | MASK;
 192                 switch (MASK)
 193                 {
 194                         case UCMODE_OP:
 195                                 n->first->AddOppedUser(d);
 196                         break;
 197                         case UCMODE_HOP:
 198                                 n->first->AddHalfoppedUser(d);
 199                         break;
 200                         case UCMODE_VOICE:
 201                                 n->first->AddVoicedUser(d);
 202                         break;
 203                 }
 204                 ServerInstance->Log(DEBUG,"grant: %s %s",n->first->name,d->nick);
 205                 return d->nick;
 206         }
 207         else
 208         {
 209                 ServerInstance->Log(DEBUG,"Channel %s not in users joined list", chan->name);
 210         }
 211         return "";
 212 }
 213
 214 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
 215 {
 216         if (!chan)
 217                 return "";
 218
 219         UCListIter n = d->chans.find(chan);
 220         if (n != d->chans.end())
 221         {
 222                 if ((n->second & MASK) == 0)
 223                 {
 224                         return "";
 225                 }
 226                 n->second ^= MASK;
 227                 switch (MASK)
 228                 {
 229                         case UCMODE_OP:
 230                                 n->first->DelOppedUser(d);
 231                         break;
 232                         case UCMODE_HOP:
 233                                 n->first->DelHalfoppedUser(d);
 234                         break;
 235                         case UCMODE_VOICE:
 236                                 n->first->DelVoicedUser(d);
 237                         break;
 238                 }
 239                 ServerInstance->Log(DEBUG,"revoke: %s %s",n->first->name,d->nick);
 240                 return d->nick;
 241         }
 242         return "";
 243 }
 244
 245 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
 246 {
 247         if (targetchannel)
 248         {
 249                 /* Display channel's current mode string */
 250                 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
 251                 user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
 252                 return;
 253         }
 254         else if (targetuser)
 255         {
 256                 if ((targetuser == user) || (*user->oper))
 257                 {
 258                         /* Display user's current mode string */
 259                         user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
 260                         if (*targetuser->oper)
 261                                 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
 262                         return;
 263                 }
 264                 else
 265                 {
 266                         user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 267                         return;
 268                 }
 269         }
 270
 271         /* No such nick/channel */
 272         user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
 273         return;
 274 }
 275
 276 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
 277 {
 278         std::string target = parameters[0];
 279         ModeType type = MODETYPE_USER;
 280         unsigned char mask = 0;
 281         chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
 282         userrec* targetuser  = ServerInstance->FindNick(parameters[0]);
 283
 284         ServerInstance->Log(DEBUG,"ModeParser::Process start: pcnt=%d",pcnt);
 285
 286         LastParse = "";
 287
 288         /* Special case for displaying the list for listmodes,
 289          * e.g. MODE #chan b, or MODE #chan +b without a parameter
 290          */
 291         if ((targetchannel) && (pcnt == 2))
 292         {
 293                 ServerInstance->Log(DEBUG,"Spool list");
 294                 const char* mode = parameters[1];
 295
 296                 while (mode && *mode)
 297                 {
 298                         if (*mode == '+')
 299                         {
 300                                 mode++;
 301                                 continue;
 302                         }
 303
 304                         ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
 305
 306                         if ((mh) && (mh->IsListMode()))
 307                         {
 308                                 mh->DisplayList(user, targetchannel);
 309                         }
 310
 311                         mode++;
 312                 }
 313         }
 314
 315         if (pcnt == 1)
 316         {
 317                 ServerInstance->Log(DEBUG,"Mode list request");
 318                 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
 319         }
 320         else if (pcnt > 1)
 321         {
 322                 ServerInstance->Log(DEBUG,"More than one parameter");
 323
 324                 if (targetchannel)
 325                 {
 326                         type = MODETYPE_CHANNEL;
 327                         mask = MASK_CHANNEL;
 328
 329                         /* Extra security checks on channel modes
 330                          * (e.g. are they a (half)op?
 331                          */
 332
 333                         if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
 334                         {
 335                                 /* We don't have halfop */
 336                                 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
 337
 338                                 int MOD_RESULT = 0;
 339                                 FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
 340                                 if (MOD_RESULT == ACR_DENY)
 341                                         return;
 342
 343                                 if (MOD_RESULT == ACR_DEFAULT)
 344                                 {
 345                                         /* Are we a uline or is it a servermode? */
 346                                         if ((!ServerInstance->ULine(user->server)) && (!servermode))
 347                                         {
 348                                                 /* Not enough permission:
 349                                                  * NOT a uline and NOT a servermode,
 350                                                  * OR, NOT halfop or above.
 351                                                  */
 352                                                 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
 353                                                 return;
 354                                         }
 355                                 }
 356                         }
 357                 }
 358                 else if (targetuser)
 359                 {
 360                         type = MODETYPE_USER;
 361                         mask = MASK_USER;
 362                         if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
 363                         {
 364                                 user->WriteServ("502 %s :Can't change mode for other users", user->nick);
 365                                 return;
 366                         }
 367                 }
 368                 else
 369                 {
 370                         /* No such nick/channel */
 371                         user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
 372                         return;
 373                 }
 374
 375                 std::string mode_sequence = parameters[1];
 376                 std::string parameter = "";
 377                 std::ostringstream parameter_list;
 378                 std::string output_sequence = "";
 379                 bool adding = true, state_change = false;
 380                 unsigned char handler_id = 0;
 381                 int parameter_counter = 2; /* Index of first parameter */
 382                 int parameter_count = 0;
 383                 bool last_successful_state_change = false;
 384
 385                 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
 386                 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
 387                         mode_sequence.insert(0, "+");
 388
 389                 last_successful_state_change = (mode_sequence[0] == '-');
 390
 391                 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
 392                 {
 393                         unsigned char modechar = *letter;
 394
 395                         switch (modechar)
 396                         {
 397                                 /* NB:
 398                                  * For + and - mode characters, we don't just stick the character into the output sequence.
 399                                  * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
 400                                  * appearing in the output sequence, we store a flag which says there was a state change,
 401                                  * which is set on any + or -, however, the + or - that we finish on is only appended to
 402                                  * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
 403                                  */
 404                                 case '+':
 405                                         /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
 406                                          * however, will allow the + if it is the first item in the sequence, regardless.
 407                                          */
 408                                         if ((!adding) || (!output_sequence.length()))
 409                                                 state_change = true;
 410                                         adding = true;
 411                                         continue;
 412                                 break;
 413                                 case '-':
 414                                         if ((adding) || (!output_sequence.length()))
 415                                                 state_change = true;
 416                                         adding = false;
 417                                         continue;
 418                                 break;
 419                                 default:
 420
 421                                         /**
 422                                          * Watch carefully for the sleight of hand trick.
 423                                          * 65 is the ascii value of 'A'. We take this from
 424                                          * the char we're looking at to get a number between
 425                                          * 1 and 127. We then logic-or it to get the hashed
 426                                          * position, dependent on wether its a channel or
 427                                          * a user mode. This is a little stranger, but a lot
 428                                          * faster, than using a map of pairs.
 429                                          */
 430                                         handler_id = (modechar - 65) | mask;
 431
 432                                         if (modehandlers[handler_id])
 433                                         {
 434                                                 bool abort = false;
 435
 436                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 437                                                 {
 438                                                         if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
 439                                                                 abort = true;
 440                                                 }
 441                                                 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
 442                                                 {
 443                                                         if (modehandlers[handler_id]->GetNumParams(adding))
 444                                                         {
 445                                                                 /* This mode expects a parameter, do we have any parameters left in our list to use? */
 446                                                                 if (parameter_counter < pcnt)
 447                                                                 {
 448                                                                         ServerInstance->Log(DEBUG,"parameter_counter = %d, pcnt = %d", parameter_counter, pcnt);
 449                                                                         parameter = parameters[parameter_counter++];
 450
 451                                                                         /* Yerk, invalid! */
 452                                                                         if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
 453                                                                                 parameter = "";
 454                                                                 }
 455                                                                 else
 456                                                                 {
 457                                                                         /* No parameter, continue to the next mode */
 458                                                                         continue;
 459                                                                 }
 460                                                         }
 461
 462                                                         /* It's an oper only mode, check if theyre an oper. If they arent,
 463                                                          * eat any parameter that  came with the mode, and continue to next
 464                                                          */
 465                                                         if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
 466                                                         {
 467                                                                 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
 468                                                                                 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
 469                                                                                 modehandlers[handler_id]->GetModeChar());
 470                                                                 continue;
 471                                                         }
 472
 473                                                         /* Call the handler for the mode */
 474                                                         ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
 475
 476                                                         if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
 477                                                         {
 478                                                                 /* The handler nuked the parameter and they are supposed to have one.
 479                                                                  * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
 480                                                                  * so we bail to the next mode character.
 481                                                                  */
 482                                                                 continue;
 483                                                         }
 484
 485                                                         if (ma == MODEACTION_ALLOW)
 486                                                         {
 487                                                                 /* We're about to output a valid mode letter - was there previously a pending state-change? */
 488                                                                 if (state_change)
 489                                                                 {
 490                                                                         if (adding != last_successful_state_change)
 491                                                                                 output_sequence.append(adding ? "+" : "-");
 492                                                                         last_successful_state_change = adding;
 493                                                                 }
 494
 495                                                                 /* Add the mode letter */
 496                                                                 output_sequence.push_back(modechar);
 497
 498                                                                 /* Is there a valid parameter for this mode? If so add it to the parameter list */
 499                                                                 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
 500                                                                 {
 501                                                                         parameter_list << " " << parameter;
 502                                                                         parameter_count++;
 503                                                                         /* Does this mode have a prefix? */
 504                                                                         if (modehandlers[handler_id]->GetPrefix() && targetchannel)
 505                                                                         {
 506                                                                                 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
 507                                                                                 if (user_to_prefix)
 508                                                                                         targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
 509                                                                                                         modehandlers[handler_id]->GetPrefixRank(), adding);
 510                                                                         }
 511                                                                 }
 512
 513                                                                 /* Call all the AfterMode events in the mode watchers for this mode */
 514                                                                 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
 515                                                                         (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
 516
 517                                                                 /* Reset the state change flag */
 518                                                                 state_change = false;
 519
 520                                                                 if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
 521                                                                                 || (parameter_count > MAXMODES))
 522                                                                 {
 523                                                                         /* We cant have a mode sequence this long */
 524                                                                         letter = mode_sequence.end() - 1;
 525                                                                         continue;
 526                                                                 }
 527                                                         }
 528                                                 }
 529                                         }
 530                                         else
 531                                         {
 532                                                 /* No mode handler? Unknown mode character then. */
 533                                                 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
 534                                         }
 535                                 break;
 536                         }
 537                 }
 538                 /* Was there at least one valid mode in the sequence? */
 539                 if (output_sequence != "")
 540                 {
 541                         if (servermode)
 542                         {
 543                                 if (type == MODETYPE_CHANNEL)
 544                                 {
 545                                         targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
 546                                         this->LastParse = targetchannel->name;
 547                                 }
 548                                 else
 549                                 {
 550                                         targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 551                                         this->LastParse = targetuser->nick;
 552                                 }
 553                         }
 554                         else
 555                         {
 556                                 if (type == MODETYPE_CHANNEL)
 557                                 {
 558                                         ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 559                                         targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
 560                                         FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
 561                                         this->LastParse = targetchannel->name;
 562                                 }
 563                                 else
 564                                 {
 565                                         user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
 566                                         FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
 567                                         this->LastParse = targetuser->nick;
 568                                 }
 569                         }
 570
 571                         LastParse.append(" ");
 572                         LastParse.append(output_sequence);
 573                         LastParse.append(parameter_list.str());
 574                 }
 575         }
 576 }
 577
 578 const std::string& ModeParser::GetLastParse()
 579 {
 580         return LastParse;
 581 }
 582
 583 void ModeParser::CleanMask(std::string &mask)
 584 {
 585         std::string::size_type pos_of_pling = mask.find_first_of('!');
 586         std::string::size_type pos_of_at = mask.find_first_of('@');
 587         std::string::size_type pos_of_dot = mask.find_first_of('.');
 588         std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
 589
 590         if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
 591         {
 592                 /* Just a nick, or just a host */
 593                 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
 594                 {
 595                         /* It has no '.' in it, it must be a nick. */
 596                         mask.append("!*@*");
 597                 }
 598                 else
 599                 {
 600                         /* Got a dot in it? Has to be a host */
 601                         mask = "*!*@" + mask;
 602                 }
 603         }
 604         else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
 605         {
 606                 /* Has an @ but no !, its a user@host */
 607                  mask = "*!" + mask;
 608         }
 609         else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
 610         {
 611                 /* Has a ! but no @, it must be a nick!ident */
 612                 mask.append("@*");
 613         }
 614 }
 615
 616 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
 617 {
 618         unsigned char mask = 0;
 619         unsigned char pos = 0;
 620
 621         /* Yes, i know, this might let people declare modes like '_' or '^'.
 622          * If they do that, thats their problem, and if i ever EVER see an
 623          * official InspIRCd developer do that, i'll beat them with a paddle!
 624          */
 625         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 626                 return false;
 627
 628         /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
 629          * A mode prefix of ':' will fuck up both server to server, and client to server.
 630          * A mode prefix of '#' will mess up /whois and /privmsg
 631          */
 632         if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
 633                 return false;
 634
 635         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 636         pos = (mh->GetModeChar()-65) | mask;
 637
 638         if (modehandlers[pos])
 639                 return false;
 640
 641         modehandlers[pos] = mh;
 642         ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
 643         return true;
 644 }
 645
 646 bool ModeParser::DelMode(ModeHandler* mh)
 647 {
 648         unsigned char mask = 0;
 649         unsigned char pos = 0;
 650
 651         if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
 652                 return false;
 653
 654         mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 655         pos = (mh->GetModeChar()-65) | mask;
 656
 657         if (!modehandlers[pos])
 658                 return false;
 659
 660         switch (mh->GetModeType())
 661         {
 662                 case MODETYPE_USER:
 663                         for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
 664                         {
 665                                 mh->RemoveMode(i->second);
 666                         }
 667                 break;
 668                 case MODETYPE_CHANNEL:
 669                         for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
 670                         {
 671                                 mh->RemoveMode(i->second);
 672                         }
 673                 break;
 674         }
 675
 676         modehandlers[pos] = NULL;
 677
 678         return true;
 679 }
 680
 681 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
 682 {
 683         unsigned char mask = 0;
 684         unsigned char pos = 0;
 685
 686         if ((modeletter < 'A') || (modeletter > 'z'))
 687                 return NULL;
 688
 689         mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 690         pos = (modeletter-65) | mask;
 691
 692         return modehandlers[pos];
 693 }
 694
 695 std::string ModeParser::UserModeList()
 696 {
 697         char modestr[256];
 698         int pointer = 0;
 699
 700         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 701         {
 702                 unsigned char pos = (mode-65) | MASK_USER;
 703
 704                 if (modehandlers[pos])
 705                         modestr[pointer++] = mode;
 706         }
 707         modestr[pointer++] = 0;
 708         return modestr;
 709 }
 710
 711 std::string ModeParser::ChannelModeList()
 712 {
 713         char modestr[256];
 714         int pointer = 0;
 715
 716         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 717         {
 718                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 719
 720                 if (modehandlers[pos])
 721                         modestr[pointer++] = mode;
 722         }
 723         modestr[pointer++] = 0;
 724         return modestr;
 725 }
 726
 727 std::string ModeParser::ParaModeList()
 728 {
 729         char modestr[256];
 730         int pointer = 0;
 731
 732         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 733         {
 734                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 735
 736                 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
 737                         modestr[pointer++] = mode;
 738         }
 739         modestr[pointer++] = 0;
 740         return modestr;
 741 }
 742
 743 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
 744 {
 745         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 746         {
 747                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 748
 749                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
 750                 {
 751                         return modehandlers[pos];
 752                 }
 753         }
 754         return NULL;
 755 }
 756
 757 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
 758 {
 759         std::string types;
 760         std::string pars;
 761
 762         if (!channel || !user)
 763                 return "";
 764
 765         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 766         {
 767                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 768                 ModeHandler* mh = modehandlers[pos];
 769                 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
 770                 {
 771                         ModePair ret;
 772                         ret = mh->ModeSet(NULL, user, channel, user->nick);
 773                         if ((ret.first) && (ret.second == user->nick))
 774                         {
 775                                 pars.append(" ");
 776                                 pars.append(user->nick);
 777                                 types.push_back(mh->GetModeChar());
 778                         }
 779                 }
 780         }
 781
 782         return types+pars;
 783 }
 784
 785 std::string ModeParser::ChanModes()
 786 {
 787         std::string type1;      /* Listmodes EXCEPT those with a prefix */
 788         std::string type2;      /* Modes that take a param when adding or removing */
 789         std::string type3;      /* Modes that only take a param when adding */
 790         std::string type4;      /* Modes that dont take a param */
 791
 792         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 793         {
 794                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 795                  /* One parameter when adding */
 796                 if (modehandlers[pos])
 797                 {
 798                         if (modehandlers[pos]->GetNumParams(true))
 799                         {
 800                                 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
 801                                 {
 802                                         type1 += modehandlers[pos]->GetModeChar();
 803                                 }
 804                                 else
 805                                 {
 806                                         /* ... and one parameter when removing */
 807                                         if (modehandlers[pos]->GetNumParams(false))
 808                                         {
 809                                                 /* But not a list mode */
 810                                                 if (!modehandlers[pos]->GetPrefix())
 811                                                 {
 812                                                         type2 += modehandlers[pos]->GetModeChar();
 813                                                 }
 814                                         }
 815                                         else
 816                                         {
 817                                                 /* No parameters when removing */
 818                                                 type3 += modehandlers[pos]->GetModeChar();
 819                                         }
 820                                 }
 821                         }
 822                         else
 823                         {
 824                                 type4 += modehandlers[pos]->GetModeChar();
 825                         }
 826                 }
 827
 828         }
 829
 830         return type1 + "," + type2 + "," + type3 + "," + type4;
 831 }
 832
 833 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
 834 {
 835         return one.second > two.second;
 836 }
 837
 838 std::string ModeParser::BuildPrefixes()
 839 {
 840         std::string mletters = "";
 841         std::string mprefixes = "";
 842         pfxcontainer pfx;
 843         std::map<char,char> prefix_to_mode;
 844
 845         for (unsigned char mode = 'A'; mode <= 'z'; mode++)
 846         {
 847                 unsigned char pos = (mode-65) | MASK_CHANNEL;
 848
 849                 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
 850                 {
 851                         pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
 852                         prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
 853                 }
 854         }
 855
 856         sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
 857
 858         for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
 859         {
 860                 mletters = mletters + n->first;
 861                 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
 862         }
 863
 864         return "(" + mprefixes + ")" + mletters;
 865 }
 866
 867 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
 868 {
 869         unsigned char mask = 0;
 870         unsigned char pos = 0;
 871
 872         if (!mw)
 873                 return false;
 874
 875         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 876                 return false;
 877
 878         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 879         pos = (mw->GetModeChar()-65) | mask;
 880
 881         modewatchers[pos].push_back(mw);
 882         ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
 883
 884         return true;
 885 }
 886
 887 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
 888 {
 889         unsigned char mask = 0;
 890         unsigned char pos = 0;
 891
 892         if (!mw)
 893                 return false;
 894
 895         if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
 896                 return false;
 897
 898         mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
 899         pos = (mw->GetModeChar()-65) | mask;
 900
 901         ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
 902
 903         if (a == modewatchers[pos].end())
 904         {
 905                 ServerInstance->Log(DEBUG, "ModeParser::DelModeWatcher: Couldn't find watcher for mode %c in list", mw->GetModeChar());
 906                 return false;
 907         }
 908
 909         modewatchers[pos].erase(a);
 910         ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
 911
 912         return true;
 913 }
 914
 915 /** This default implementation can remove simple user modes
 916  */
 917 void ModeHandler::RemoveMode(userrec* user)
 918 {
 919         char moderemove[MAXBUF];
 920         const char* parameters[] = { user->nick, moderemove };
 921
 922         if (user->IsModeSet(this->GetModeChar()))
 923         {
 924                 sprintf(moderemove,"-%c",this->GetModeChar());
 925                 ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
 926         }
 927 }
 928
 929 /** This default implementation can remove simple channel modes
 930  * (no parameters)
 931  */
 932 void ModeHandler::RemoveMode(chanrec* channel)
 933 {
 934         char moderemove[MAXBUF];
 935         const char* parameters[] = { channel->name, moderemove };
 936
 937         if (channel->IsModeSet(this->GetModeChar()))
 938         {
 939                 userrec* n = new userrec(ServerInstance);
 940
 941                 sprintf(moderemove,"-%c",this->GetModeChar());
 942                 n->SetFd(FD_MAGIC_NUMBER);
 943
 944                 ServerInstance->SendMode(parameters, 2, n);
 945
 946                 delete n;
 947         }
 948 }
 949
 950 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
 951 {
 952         /* Clear mode list */
 953         memset(modehandlers, 0, sizeof(modehandlers));
 954         memset(modewatchers, 0, sizeof(modewatchers));
 955
 956         /* Last parse string */
 957         LastParse = "";
 958
 959         /* Initialise the RFC mode letters */
 960
 961         /* Start with channel simple modes, no params */
 962         this->AddMode(new ModeChannelSecret(Instance), 's');
 963         this->AddMode(new ModeChannelPrivate(Instance), 'p');
 964         this->AddMode(new ModeChannelModerated(Instance), 'm');
 965         this->AddMode(new ModeChannelTopicOps(Instance), 't');
 966         this->AddMode(new ModeChannelNoExternal(Instance), 'n');
 967         this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
 968
 969         /* Cannel modes with params */
 970         this->AddMode(new ModeChannelKey(Instance), 'k');
 971         this->AddMode(new ModeChannelLimit(Instance), 'l');
 972
 973         /* Channel listmodes */
 974         this->AddMode(new ModeChannelBan(Instance), 'b');
 975         this->AddMode(new ModeChannelOp(Instance), 'o');
 976         this->AddMode(new ModeChannelHalfOp(Instance), 'h');
 977         this->AddMode(new ModeChannelVoice(Instance), 'v');
 978
 979         /* Now for usermodes */
 980         this->AddMode(new ModeUserServerNotice(Instance), 's');
 981         this->AddMode(new ModeUserWallops(Instance), 'w');
 982         this->AddMode(new ModeUserInvisible(Instance), 'i');
 983         this->AddMode(new ModeUserOperator(Instance), 'o');
 984         this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');
 985 }